The connecting pin in a 2-26 rotary hammer (such as the Bosch GBH 2-26) is a mechanical component used to link or secure various moving parts within the hammering mechanism. Its main function is to ensure that these parts work together smoothly, especially in the pneumatic system that delivers the hammering action.

Here’s how the connecting pin works in the rotary hammer:

Connects the Piston and Striker: The connecting pin often plays a role in linking the piston to the striker or other components in the hammering mechanism. This ensures that when the piston moves (driven by the motor), it transfers the motion to the striker, which impacts the drill bit to create the hammering force.

Ensures Smooth Motion Transfer: In a rotary hammer, precision is essential for the effective conversion of rotational motion into hammering force. The connecting pin helps ensure that this motion is transferred smoothly between parts like the piston, striker, and other components involved in generating the hammering action.

Supports Durability Under Impact: Since rotary hammers are used for heavy-duty drilling into hard materials like concrete, the connecting pin must withstand repeated impacts and high pressure. It helps maintain the integrity and alignment of parts under these extreme conditions.

Reduces Wear on Components: By holding various parts together in the hammering mechanism, the connecting pin reduces friction and wear on individual components, ensuring that the machine lasts longer and operates more efficiently.

If the connecting pin is worn out or broken, the rotary hammer might lose its hammering function, experience reduced power, or make unusual noises during operation.